Here is an activity to identify different parts of a parabola using the function.
Try working through this activity.
On the first page, use the instructions to work out the locations specified. Once you get values using the function, check to make sure it matches the points on the graph. The first quadratic function is nice because it may be factored to find the horizontal intercepts.
On the second page, find the vertex coordinates and vertical intercepts like you did on the first page. However, to find the horizontal intercepts you will need to use the quadratic formula. Show your work carefully so that you can refer back to this as you do the homework